I dropped my new Ipod Nano, and can't tell if it affected sound quality?

I dropped my Ipod and believe it could have affected sound quality as something does not sound right but I don’t know if it is my imagination or really different. Could a drop cause a difference in sound quality even though it is still playing and sounds mostly normal? It sounds like it is skipping undertones or beats.

I tried to listen to two different sources but it is hard to tell.